POLYVIA™ Alkali-Free Glass Fiber combines high tensile strength, electrical insulation and chemical stability for reliable reinforcement in industrial and composite materials. Available in multiple fiber lengths for different processing and application requirements.
Alkali-Free Glass Fiber is an inorganic glass fiber material available in different forms and sizes for compatible engineering applications.
POLYVIA™ supplies both 3–100 mm chopped fiber and 80–1500 mesh glass fiber powder. Chopped fibers can form a distributed reinforcement network within compatible matrices, while fiber form and size should be selected according to the required function, formulation and production process.
Different cementitious and composite systems require different levels of fiber dispersion, crack control and reinforcement. Selecting the appropriate fiber form and size helps balance processing behavior with the required reinforcement performance.
Brittle cementitious and composite matrices can develop cracks under shrinkage, dimensional movement and applied stress, reducing structural integrity.
Cementitious and other brittle matrices have limited tensile capacity, allowing cracks to develop when localized tensile stresses exceed the strength of the matrix.
Components subjected to bending develop tensile stresses that can initiate cracking and progressively reduce the integrity of the composite matrix.
Stress concentrated around cracks, edges and geometric transitions can accelerate crack propagation and localized damage in brittle composite systems.
Selecting the appropriate Alkali-Free Glass Fiber requires consideration of the application, matrix system, fiber length, surface compatibility and processing method. Fiber length alone does not determine final reinforcement performance.
| Application | Fiber Selection Focus | Processing Focus |
|---|---|---|
| Lightweight Cement & Wall Panels | Length · Matrix Compatibility | Dispersion · Panel Forming |
| Wall Reinforcement & Insulation Systems | Length · Distribution | Dispersion · Material Integration |
| Roofing & Waterproof Composites | Fiber Distribution · Matrix Compatibility | Impregnation · Composite Processing |
| Electrical Insulation Materials | Reinforcement · Surface Compatibility | Dispersion · Composite Forming |
| FRP Cooling Towers | Matrix Compatibility · Reinforcement | Resin Wet-Out · Composite Processing |
| Anti-Corrosion FRP Pipes & Tanks | Resin Compatibility · Reinforcement | Wet-Out · Uniform Distribution |
| FRP Infrastructure Components | Length · Mechanical Reinforcement | Dispersion · Composite Forming |
| Molded FRP Construction Components | Length · Matrix Compatibility | Mixing · Molding Process |
Application → Matrix System → Fiber Length → Surface Compatibility → Processing Method → Required Performance
Alkali-Free Glass Fiber reinforces compatible matrices through four connected mechanisms: fiber dispersion, fiber–matrix interaction, crack bridging and stress redistribution.
Chopped glass fibers disperse throughout the matrix in multiple orientations, creating distributed reinforcement and increasing the likelihood of fibers intersecting developing crack paths.
As the matrix develops strength, bonding and interaction along the fiber–matrix interface enable tensile stress to be transferred from the surrounding matrix to the embedded glass fibers.
Fibers crossing a developing crack remain embedded on both sides of the crack plane, helping carry tensile stress across the opening and restrict further crack propagation.
After cracking begins, bridging fibers continue to transfer tensile stress beyond the localized crack zone, helping distribute forces through a broader region of the reinforced composite.
| Property | Specification |
|---|---|
| Fiber Length | 3–100 mm |
| Tensile Strength | 600–1500 MPa |
| Density | 2.7 g/cm³ |
| Combustible Content | 1.75% |
| Moisture Content | <1% |
POLYVIA™ Alkali-Free Glass Fiber is used in compatible building materials, FRP systems and engineering composites requiring lightweight reinforcement, dimensional stability, mechanical performance or electrical insulation.
Application suitability should be evaluated according to fiber length, surface treatment, matrix compatibility, manufacturing process and required performance.
Alkali-Free Glass Fiber can reinforce compatible lightweight cement panels and wall board systems, supporting dimensional stability, matrix integrity and crack control in prefabricated building components.
Chopped Glass Fiber can be incorporated into compatible wall reinforcement and insulation materials, providing distributed reinforcement while supporting dimensional stability and integrity in lightweight building systems.
Alkali-Free Glass Fiber provides reinforcement for compatible roofing membranes, waterproof composites and reinforced building materials, supporting dimensional stability and mechanical integrity during production and service.
Alkali-Free Glass Fiber is suitable for compatible electrical insulation and construction composite materials requiring reinforcement together with low electrical conductivity and reliable dimensional stability.
Alkali-Free Glass Fiber reinforces compatible FRP cooling tower panels, casings and structural components, supporting mechanical strength, dimensional stability and durability in industrial cooling systems.
Glass fiber reinforcement is used in compatible FRP pipes, chemical tanks and corrosion-resistant equipment, supporting structural integrity in industrial fluid handling and storage applications.
Alkali-Free Glass Fiber can reinforce compatible FRP profiles, panels and infrastructure components requiring lightweight construction, mechanical performance and dimensional stability in engineering applications.
Chopped Glass Fiber can reinforce compatible molded FRP building components and composite parts, supporting distributed reinforcement, dimensional stability and reliable performance in manufactured construction products.
When properly selected and uniformly dispersed, POLYVIA™ Alkali-Free Glass Fiber provides distributed reinforcement and mechanical support throughout compatible composite and building-material systems.
Dispersed glass fibers intersect developing crack paths, helping restrict crack opening and distribute localized stresses throughout compatible fiber-reinforced material systems.
Uniformly distributed glass fibers reinforce the matrix in multiple directions, providing broader mechanical support rather than reinforcement concentrated within a single plane.
Glass fibers help carry and transfer tensile forces through the reinforced matrix, reducing localized stress concentration and supporting more effective stress distribution.
Fiber reinforcement supports interaction within the composite matrix, helping maintain material integrity and mechanical continuity when localized cracking or deformation begins.
Glass fiber provides inorganic reinforcement without the electrochemical corrosion mechanism associated with steel, supporting applications where corrosion-free reinforcement is an important consideration.
Alkali-Free Glass Fiber helps reinforce compatible composite systems against dimensional change, supporting shape retention and structural stability during processing and service.
Alkali-Free Glass Fiber and Alkali-Resistant Glass Fiber are different glass fiber categories with different selection priorities and application environments.
The appropriate fiber should be selected according to glass composition, matrix system, exposure conditions, processing requirements and required reinforcement performance.
| Selection Factor | Alkali-Free Glass Fiber | Alkali-Resistant Glass Fiber |
|---|---|---|
| Primary Positioning | Composite & engineering reinforcement | Cementitious reinforcement |
| Fiber Length | 3–100 mm | 12 / 24 / 36 mm |
| Key Selection Focus | Matrix Compatibility · Length · Processing | Alkali Resistance · Length · Cement Compatibility |
| ZrO₂ Content | Not specified | 16.7% |
| Typical Application Direction | FRP · Panels · Insulation · Building Composites | GRC · GFRC · Cement-Based Reinforcement |
| Alkaline Cement Exposure | Application-specific evaluation required | Designed for alkaline cementitious environments |
“Alkali-Free” does not mean “Alkali-Resistant.”
Alkali-Free Glass Fiber should not automatically be considered equivalent to Alkali-Resistant Glass Fiber (AR Glass Fiber) when long-term exposure to alkaline cementitious environments is involved.
For GRC, GFRC and other cement-based reinforcement applications, where glass fibers remain embedded in a highly alkaline matrix, an appropriately specified AR Glass Fiber with verified alkali resistance should be evaluated.
Fiber tensile strength and length alone do not determine reinforcement performance.
Matrix composition, fiber length, rheology, dosage and mixing conditions all influence fiber distribution, processability and reinforcement effectiveness.
Compatible Matrix → Correct Fiber Specification → Suitable Processing → Uniform Dispersion → Effective Fiber Reinforcement
Glass fiber should be matched to the resin, composite or building-material matrix to support effective interfacial interaction, fiber distribution and reinforcement performance.
Select the appropriate fiber specification within the available 3–100 mm length range according to the reinforcement requirement, material system and manufacturing process.
Fiber addition, mixing, impregnation and forming conditions should be compatible with the selected material system to maintain processability and consistent fiber incorporation.
Uniform fiber distribution helps minimize localized fiber concentration and enables reinforcement to act more consistently throughout the finished composite or material matrix.
POLYVIA™ Alkali-Free Glass Fiber is supplied in 1–5 kg inner plastic bags and 10–25 kg woven bags or cartons, with pallet loading up to 1200 kg. Customized packaging is available upon request.
2–6 kg/m³
Use 2–6 kg/m³ as a starting range where applicable. Final dosage should be adjusted according to fiber length, matrix system, processing method and required performance.
Add Alkali-Free Glass Fiber gradually and uniformly during production to achieve consistent fiber distribution and minimize localized fiber concentration.
The appropriate addition sequence and mixing time should be determined according to the specific matrix and manufacturing process.
Uniform Addition · Good Dispersion · Matrix Compatibility · Process Validation
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Selection, processing & application guidance
Download ↓POLYVIA™ Alkali-Free Glass Fiber is an inorganic reinforcement fiber available in 3–100 mm lengths for compatible concrete, mortar and engineering material systems.
It can be evaluated for concrete, mortar, shotcrete, tunnel, bridge, underground, pavement and other compatible engineering material systems requiring distributed fiber reinforcement or crack control.
They are different product categories.
Alkali-Free Glass Fiber is selected according to fiber length, application and processing requirements, while Alkali-Resistant Glass Fiber is specifically formulated for improved resistance to alkaline cementitious environments.
For sustained high-alkalinity exposure, particularly in GRC/GFRC, an appropriately specified AR Glass Fiber should be evaluated.
The recommended dosage according to the supplied product guidance is:
2–6 kg/m³
Final dosage should be evaluated according to fiber length, formulation, workability, mixing conditions and required performance.
POLYVIA™ Alkali-Free Glass Fiber is available in 3–100 mm lengths.
The appropriate length should be selected according to the material system, component geometry, mixing process and required reinforcement performance.
For the specified cementitious mixing process, the recommended sequence is:
Aggregate → Glass Fiber → Cement → Water → Mixing → Final Water Adjustment
Mix sufficiently to achieve uniform fiber distribution throughout the material.
Yes. It can be used in compatible concrete and mortar systems where distributed fiber reinforcement and crack control are required.
Suitability should be evaluated according to fiber specification, cementitious exposure, dosage, processing conditions and required durability.
Begin with the application and evaluate matrix rheology, component geometry, mixing equipment, processing conditions and reinforcement requirements.
Shorter fibers generally offer easier incorporation, while longer fibers provide greater potential bridging length but require greater control of fiber distribution and workability.
Selecting the appropriate Alkali-Free Glass Fiber involves more than choosing a fiber length. Share your application, material system, production process and performance requirements, and POLYVIA can support preliminary fiber selection, dosage evaluation and processing compatibility.